Skip to Main content Skip to Navigation
Journal articles

RegSEM: a versatile code based on the spectral element method to compute seismic wave propagation at the regional scale

Abstract : The spectral element method, which provides an accurate solution of the elastodynamic problem in heterogeneous media, is implemented in a code, called RegSEM, to compute seismic wave propagation at the regional scale. By regional scale we here mean distances ranging from about 1 km (local scale) to 90 • (continental scale). The advantage of RegSEM resides in its ability to accurately take into account 3-D discontinuities such as the sediment-rock interface and the Moho. For this purpose, one version of the code handles local unstructured meshes and another version manages continental structured meshes. The wave equation can be solved in any velocity model, including anisotropy and intrinsic attenuation in the continental version. To validate the code, results from RegSEM are compared to analytical and semi-analytical solutions available in simple cases (e.g. explosion in PREM, plane wave in a hemispherical basin). In addition, realistic simulations of an earthquake in different tomographic models of Europe are performed. All these simulations show the great flexibility of the code and point out the large influence of the shallow layers on the propagation of seismic waves at the regional scale. RegSEM is written in Fortran 90 but it also contains a couple of C routines. It is an open-source software which runs on distributed memory architectures. It can give rise to interesting applications, such as testing regional tomographic models, developing tomography using either passive (i.e. noise correlations) or active (i.e. earthquakes) data, or improving our knowledge on effects linked with sedimentary basins.
Document type :
Journal articles
Complete list of metadatas

Cited literature [68 references]  Display  Hide  Download

https://hal-insu.archives-ouvertes.fr/insu-01399964
Contributor : Eva Fareau <>
Submitted on : Monday, November 21, 2016 - 11:20:00 AM
Last modification on : Wednesday, October 14, 2020 - 4:18:59 AM
Long-term archiving on: : Tuesday, March 21, 2017 - 12:33:41 AM

File

Geophys. J. Int.-2012-Cupillar...
Publisher files allowed on an open archive

Identifiers

Citation

Paul Cupillard, Elise Delavaud, Gaël Burgos, Geatano Festa, Jean-Pierre Vilotte, et al.. RegSEM: a versatile code based on the spectral element method to compute seismic wave propagation at the regional scale. Geophysical Journal International, Oxford University Press (OUP), 2011, 188 (3), pp.1203 - 1220. ⟨10.1111/j.1365-246X.2011.05311.x⟩. ⟨insu-01399964⟩

Share

Metrics

Record views

424

Files downloads

977